Explain why the composition of the phospholipid bilayer determines how readily water passes through it.
What will be an ideal response?
The phospholipid bilayer is a fluid mosaic and, depending on the function of the cell, contains various ratios of phospholipids, cholesterol, and proteins. Water molecules slip between the spaces between the fatty acid tails. Membranes with higher levels of cholesterol are less permeable to water because cholesterol fills these spaces.
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What type of hair covers the fetus?
A. Lanugo B. Vernix C. Vellus D. Alopecia E. Terminal
Which of the following is a derivative of riboflavin?
a) NAD b) FAD c) Lactic acid d) Pyruvic acid e) ADP
Match the hormone with the best description.A. Aids in spermatogenesisB. Inhibits FSH secretionC. Menstrual cycleD. Increases flexibility of connective tissueRelaxin
Fill in the blank(s) with the appropriate word(s).
Smooth muscle can contract without a change in membrane potential following:
A. stimulation of ?-adrenergic receptors in the smooth muscle B. inhibition of Rho kinase in the smooth muscle C. stimulation of InsP3 production in the smooth muscle D. stimulation of nitric oxide release from endothelial cells E. stimulation of K+ channels in the smooth muscle